Viewing archive of Saturday, 8 November 2008
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2008 Nov 08 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 313 Issued at 2200Z on 08 Nov 2008IA. Analysis of Solar Active Regions and Activity from 07-2100Z to 08-2100Z Solar activity was very low. No flares were observed.
The visible disk was spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 07-2100Z to 08-2100Z
Geomagnetic field activity ranged from quiet to active levels. ACE
solar wind data indicated Earth remained within a recurrent coronal
hole high-speed stream (CH HSS). Solar wind velocities gradually
increased from approximately 440 to 600 km/sec during the period.
IMF Bt was enhanced at the start of the period (peak 13 nT), then
gradually decreased to a low of 2 nT late in the period. IMF Bz
ranged from 08 to -09 nT during the first half of the period, then
settled to a range of 04 to -04 nT for the rest of the period.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to be at quiet to unsettled levels with a slight chance for
active levels on day 1 (09 November) as the CH HSS gradually
subsides. Activity is expected to decrease to mostly quiet levels
for the rest of the period (10 - 11 November).
III. Event Probabilities 09 Nov to 11 Nov
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 08 Nov 068 Predicted 09 Nov-11 Nov 068/068/068 90 Day Mean 08 Nov 068
V. Geomagnetic A Indices
Observed Afr/Ap 07 Nov 007/008 Estimated Afr/Ap 08 Nov 015/015 Predicted Afr/Ap 09 Nov-11 Nov 007/010-005/005-005/005
VI. Geomagnetic Activity Probabilities 09 Nov to 11 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
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